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The effects of exposure of rats to a 900 MHz electromagnetic field on histology, oxidative stress and apoptosis in the testes should be investigated.
Rats were divided into 3 groups: 1) cage control (n=8), 2) sham exposure (n=7) and 3) exposure to the electromagnetic field (n=8).
|ばく露時間||continuous for 1 hour/day for 30 days|
|チャンバの詳細||plexiglass jar (42 cm x 30 cm x 50 cm in size)|
|ばく露装置の詳細||all rats were exposed simultaneously in one jar; an oscillator was used to establish a 900 MHz field similar to the frequency of a mobile phone; a half-wave dipole antenna made from a copper rod (1 mm Œ 15 cm) was installed into the central region, approximately 11 cm inside the open surface of the jar; intensity of the exposure field was measured every day from 9 different points on the floor of the jar|
|Sham exposure||A sham exposure was conducted.|
|Additional information||electric field measurements were performed before each application and the absence of any other environmental electromagnetic field was confirmed before sham exposure and exposure were conducted|
The diameter and epithelium thickness of the seminiferous tubules were significantly lower, while the histopathological damage and apoptosis rate were significantly higher in the exposure group compared to the cage control and sham exposure. However, histopathological damage and the apoptosis rate in the sham exposure group were also significantly higher compared to the cage control but significantly lower in comparison to the exposure group.
The enzyme activities of catalase and superoxide dismutase, the amount of glutathione and lipid peroxidation were significantly decreased in the exposure group compared to the cage control. On the other hand, the enzyme activities of the catalase and superoxide dismutase and the amount of lipid peroxidation were significantly increased in the exposure group compared to the sham exposure group. In the sham exposure, the enzyme activity of the superoxide dismutase and the amount of glutathione and lipid peroxidation were significantly decreased compared to the cage control.
The significant differences in the sham exposure group in comparison to the cage control were probably stress-induced by the experimental procedure.
The authors conclude that exposure of rats to a 900 MHz electromagnetic field could alter histology, the oxidative status and apoptosis induction in the testes.